Compact Com*pact", v. t. [imp. & p. p. Compacted; p. pr. & vb. n. Compacting.] 1. To thrust, drive, or press closely together; to join firmly; to consolidate; to make close; -- as the parts which compose a body. Now the bright sun compacts the precious stone. --Blackstone. 2. To unite or connect firmly, as in a system. The whole body fitly joined together and compacted by that which every joint supplieth. --Eph. iv. 16., Compact Com"pact, n. [L. compactum, fr. compacisci, p. p. compactus, to make an agreement with; com- + pacisci to make an agreement. See Pact.] An agreement between parties; a covenant or contract. The law of nations depends on mutual compacts, treaties, leagues, etc. --Blackstone. Wedlock is described as the indissoluble compact. --Macaulay. The federal constitution has been styled a compact between the States by which it was ratified. --Wharton. Syn: See Covenant.